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I have an external bib where I put a reference to an external URL.

  author = {The Author},
  title = {The Title},
  howpublished = "\url{http://thisismyurl/2010/3/a-long-url-here}",
  year = {year}

When I compile, the URL (when displayed in Bibliography) exceeds the bounds of the page (set as customs). The URL is composed by different terms concatenated with - symbol. a-long-url-here can be the following:


The bib is inserted in the following manner:


Is there any mechanism to fix this behaviour? I checked perform a line break of an URL in bibliography manually (biblatex, hyperref) but I don't know how to use it in my situation.


For the sake of completeness, I use PdfLatex.

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Did you try the suggested \sloppy and \emergencystretch settings? – mafp Dec 28 '12 at 18:47
@mafp No. Where do I have to put these commands? Thanks. – Lorenzo Boaro Dec 28 '12 at 18:52
since the url package allows breaks, it sounds like you are using hyperref, which doesn't allow them by default. if you specify the option \usepackage[breaklinks]{hyperref} you should get better results. of course, this is just a guess; i'm not familiar with the IEEEbib style, so it may apply some restrictions i'm not aware of. – barbara beeton Dec 28 '12 at 18:58
To avoid the option clash, you can type \hypersetup{breaklinks=true}. – Mico Dec 28 '12 at 20:51
Don't provide both of these instructions, but only the first one -- after the hyperref package has been loaded either directly by one of your own instructions or indirectly by one of the packages you load (or by the document class). – Mico Dec 30 '12 at 0:15
up vote 4 down vote accepted

Assuming that you have a file named bibliog.bib with the contents given in your posting, the following MWE (minimum working example) generates a reference with the URL string broken at a hyphen. The key steps are (i) load the url package with the hyphens option and (ii) enable the breaklinks=true option of the hyperref package.

\setlength\textwidth{4in} % simulate a very narrow line width
\bibliographystyle{IEEEtran} % *not* IEEEbib...

enter image description here

share|improve this answer
Thanks for your support. – Lorenzo Boaro Dec 31 '12 at 8:53

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